app: use SquareCode as the program icon

Swap the canonical KIND_ICONS.program glyph from Package to SquareCode, and route the palette + System-map program affordances through it. (The Programs nav icon in Layout.tsx changes too, committed separately with its own WIP.)

app/src/components/CommandPalette.tsx

@@ -1,9 +1,11 @@
 import { useEffect, useMemo, useState } from "react"
 import { useNavigate } from "react-router-dom"
-import { ExternalLink, Gauge, Maximize2, Package, Search } from "lucide-react"
+import { ExternalLink, Gauge, Maximize2, Search } from "lucide-react"
 import { useGateway, useGraph, useMeshDeployments, usePrograms } from "@/services/api/hooks"
 import { kindIcon } from "@/lib/labels"
 
+const ProgramIcon = kindIcon("program")
+
 // The command palette — the keyboard twin of the System map's inspect panel. ⌘K
 // from anywhere: an empty query is the "Start Menu" (launchable apps); typing
 // searches every deployment and program. One row per real thing: a deployed
@@ -233,7 +235,7 @@ function PaletteBody({ onClose }: { onClose: () => void }) {
                   title="Go to program (source)"
                   className="shrink-0 text-[var(--muted)] hover:text-[var(--card-foreground)]"
                 >
-                  <Package size={13} />
+                  <ProgramIcon size={13} />
                 </button>
               )}
               <button

app/src/lib/labels.ts

@@ -1,18 +1,18 @@
 import type { LucideIcon } from "lucide-react"
-import { Box, Clock, LayoutTemplate, Package, Server, Waypoints, Wrench } from "lucide-react"
+import { Box, Clock, LayoutTemplate, Server, SquareCode, Waypoints, Wrench } from "lucide-react"
 
 // Canonical kind → icon — the single source of truth so the nav, Overview tiles,
 // cards, the System map, and the command palette all speak one visual language.
 // (Colors live in KindBadge; labels/descriptions are below.) `program` is the
-// catalog pseudo-kind, not a deployment kind — the same Package glyph the
+// catalog pseudo-kind, not a deployment kind — the SquareCode glyph the Programs
-// Programs nav entry and Overview tile use.
+// nav entry and Overview tile use.
 export const KIND_ICONS: Record<string, LucideIcon> = {
   service: Server,
   job: Clock,
   tool: Wrench,
   static: LayoutTemplate,
   reference: Waypoints,
-  program: Package,
+  program: SquareCode,
 }
 
 export function kindIcon(kind: string): LucideIcon {

app/src/pages/SystemMap.tsx

@@ -31,6 +31,7 @@ import {
   Plus,
   RotateCw,
   Router,
+  SquareCode,
   Trash2,
   X,
 } from "lucide-react"
@@ -169,7 +170,7 @@ function MapNode({ data }: NodeProps) {
             d.onProgram?.(d.program!)
           }}
         >
-          <Package size={11} />
+          <SquareCode size={11} />
         </button>
       ) : (
         // No program (inline infra) — a same-size, non-interactive cell with a